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Your wheels and tires are among the most important parts of your car. Wheels and tires must be inspected periodically for wear and replaced when they become damaged.



What is a Transmission Mount?

The transmission mount is one of many drivetrain mounts found on most cars and trucks. Most vehicles have two or three engine mounts and at least one, and sometimes two or more, transmission mounts. Along with bell housing bolts, the transmission mount keeps the transmission safe and secure underneath the hood.

How do Transmission Mounts Work?

There are two main components to every mount – the transmission mount bracket and the mount itself. The bracket is often made of steel. The mount consists of a urethane or rubber bushing that is bolted, welded, or chemically bonded to the transmission bracket. The bracket secures the transmission to the vehicle. The rubber or urethane bushing isolates drivetrain vibration and reduces noise levels in the vehicle’s cabin.

How is a Transmission Mount Made?

Aftermarket replacement parts are often constructed out of a high-strength steel bracket with a chemically bonded bushing. On many vehicle applications, the bushing and bracket are inseparable from one another and must be replaced as a unit when one component wears out or becomes damaged.

Automotive enthusiasts often “mix and match” engine and transmission mounts, sometimes even building them from scratch when installing newer engines and transmissions in older cars and trucks.

Why does a Transmission Mount Fail?

  • Transmission mounts normally fail after 60,000-100,000 miles or more, due to oxidation and vibration.
  • Oxidation causes the rubber or urethane in the mount to fail.
  • Vibration causes the steel bracket to fail.
  • Improperly lifting the engine and transmission assembly during removal may result in broken transmission mounts.
  • Front-end damage accident damage.

What are the Symptoms of Transmission Mount Failure?

  • Excess vibration while the engine is running.
  • Clanking or clunking noises when shifting gears.
  • Transmission is difficult to put into gear or shift.

What are the Implications of Ignoring a Worn Transmission Mount?

  • Excessive wear on the transmission mount’s attachment point.
  • Premature wear to major drivetrain components, like the driveshaft or axles.
  • Premature wear to the other engine and transmission mounts.
  • Broken or worn transmission lines from excess drivetrain movement.

A vehicle’s drivetrain mounts, including the engine and transmission mounts, ensure a quiet, vibration-free drive. Drivers may notice excess vibration or difficulty shifting as the drivetrain mounts wear out and become flexible.

If you have questions or concerns about transmission mounts or any of your vehicle’s components, come into your local Pep Boys where we can answer any question, help you find any part, or perform any vehicle service you might need.